Medical Claims and Benefits Payable (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2016

Dec. 31, 2015

Other Liabilities Disclosure [Abstract]

Schedule of liability for unpaid claims and claims adjustment expense

The following table provides the details of our medical claims and benefits payable (including amounts payable for the provision of long-term services and supports, or LTSS) as of the dates indicated.

	June 30, 2016		December 31, 2015
	(In millions)
Fee-for-service claims incurred but not paid (IBNP)	$	1,292	$	1,191
Pharmacy payable	103		88
Capitation payable	37		140
Other	334		266
	$	1,766	$	1,685

The following table provides the details of our medical claims and benefits payable (including amounts payable for the provision of long-term services and supports, or LTSS) as of the dates indicated.

	December 31,
	2015		2014		2013
	(In millions)
Fee-for-service claims incurred but not paid (IBNP)	$	1,191	$	871	$	424
Pharmacy payable	88		71		45
Capitation payable	140		28		20
Other	266		231		181
	$	1,685	$	1,201	$	670

Components of change in medical claims and benefits payable

The following table presents the components of the change in our medical claims and benefits payable for the periods indicated. The amounts presented for “Components of medical care costs related to: Prior periods” represent the amount by which our original estimate of medical claims and benefits payable at the beginning of the period were more than the actual amount of the liability based on information (principally the payment of claims) developed since that liability was first reported.

	Six Months Ended June 30, 2016			Year Ended December 31, 2015
	(Dollars in millions)
Medical claims and benefits payable, beginning balance	$	1,685		$	1,201
Components of medical care costs related to:
Current period	7,371			11,935
Prior periods	(189		)	(141		)
Total medical care costs	7,182			11,794
Change in non-risk provider payables	24			48
Payments for medical care costs related to:
Current period	5,885			10,448
Prior periods	1,240			910
Total paid	7,125			11,358
Medical claims and benefits payable, ending balance	$	1,766		$	1,685
Benefit from prior period as a percentage of:
Balance at beginning of period	11.3		%	11.8		%
Premium revenue, trailing twelve months	1.3		%	1.1		%
Medical care costs, trailing twelve months	1.4		%	1.2		%

The following table presents the components of the change in our medical claims and benefits payable from continuing and discontinued operations combined for the periods indicated. The amounts presented for "Components of medical care costs related to: Prior periods" represent the amount by which our original estimate of medical claims and benefits payable at the beginning of the period were more than the actual amount of the liability based on information (principally the payment of claims) developed since that liability was first reported.

	Year Ended December 31,
	2015			2014			2013
	(Dollars in millions)
Balances at beginning of period	$	1,201		$	670		$	495
Components of medical care costs related to:
Current period	11,935			8,123			5,434
Prior periods	(141		)	(46		)	(53		)
Total medical care costs	11,794			8,077			5,381
Change in non-risk provider payables	48			(32		)	111
Payments for medical care costs related to:
Current period	10,448			7,064			4,932
Prior periods	910			450			385
Total paid	11,358			7,514			5,317
Balances at end of period	$	1,685		$	1,201		$	670